Thread: 06-rxp test this weekend
04-15-2012, 07:56 PM #1
06-rxp test this weekend
I took the RXP out this weekend to test the new Rotax racing ecu and the new Supertech valve springs, I let it warm up real good, then I noticed the afr's were a little rich up at the 7000 rpm range, so I took off the rising rate hose and plugged hole, they were still a little high so I dialed down the fuel pressure on the pressure regulator, it seemed to be at 12.5 to 13.5 thru all the range but I could not get above 8100 rpms, the water was kind of choppy and I could tell I was bouncing a little bit, I could not find a smooth spot,
I hooked the rising rate hose back up, and adjusted the fuel pressure regulator and it seemed to be dead on 12.2 across all rpms and I could get it up to 8300,
I am running an untouched 15/20 right now,
I let it cool down, the warmed it up real good, then did some practice starts and buoy turns, the ET-137 was awesome on the buoy turns with that Rotax ecu, just a slight off throttle to initiate the turn then I could power thru it nicely,
I don't know if this stock fuel pump can handle all the fuel this thing needs now, or not?
It kind of felt like I was getting supercharger slip when the ski would kind of come unhooked which is normal, but it felt like I should be getting more?
04-15-2012, 10:32 PM #2
Wouldn't hurt to pull the s/c and check the slip, I need to do that on mine. Slow91 has walbro fuel pumps for around 85.00. What's the rev limiter with your rotax?
04-16-2012, 07:50 AM #3
it is supposed to be 8650
I have less that 8 hours on a new et-137 install with new mcmaster washers and shim with the slip set pretty high,
Slow91 said they were 95 shiipped
04-16-2012, 07:53 AM #4
04-16-2012, 08:42 AM #5
I stand corrected I looked at the old post from the guy I bought it from and it is 8600 rpms mapped for 42's
do you think the stock fuel pump can not keep up with the duty cycle?
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By dukenyc in forum Kawasaki Open DiscussionReplies: 171Last Post: 09-20-2011, 09:59 AM
By hydrojunkie in forum Yamaha PWC Performance (2-stroke)Replies: 21Last Post: 05-05-2008, 11:28 AM
By izz0 in forum Yamaha Open DiscussionReplies: 0Last Post: 09-16-2007, 09:21 PM
By dokken70 in forum 4-Tec PerformanceReplies: 20Last Post: 10-20-2006, 10:32 PM
By MikeTrin in forum 4-Tec PerformanceReplies: 13Last Post: 05-10-2005, 03:23 PM